D.C. Mun. Regs. tit. 4, § 510
510.1 Recruiting methods for all job classifications shall not include a preference for a specific marital status. For example, an employer shall not advertise, “Excellent opportunity for a single person who enjoys travel” or “Stable, married person preferred.”
510.2 Questions pertaining solely to marital status shall be eliminated from applications for employment, unless the employer can show a business necessity for the inquiry.
510.3 Decisions on hiring, promotion, compensation, lay-off, and other terms and conditions of employment shall not be related to marital status.
SOURCE: Final Rulemaking published at 56 DCR 006029 (July 31, 2009).